Friends of my mom's were dope growing hippies. Dude (who was actually very smart, had advanced degrees in both law and economics) gave me one of David I.... books and my mom let me read it because she thought it was about Princess Di. I was 15 or so at the time and many books were baned in our house due to religion.

While not totally to my tastes, it gave me a little insight and the interest to go further.